FIG. 5.

Effects of various concentrations of siamycin I on gelatinase production by E. faecalis OU510 induced by 100 nM GBAP. After 2 h of incubation, 100 nM synthetic GBAP and different amounts of siamycin I were added to cultures of E. faecalis OU510, and the cultures were incubated for another 3 h to induce gelatinase production. Then the OD₆₆₀ (○) and gelatinase activity at OD₅₄₀ (•) in the culture supernatants were determined. The data are averages ± standard deviations of duplicate determinations.